Self-sealing shingle



March 12, 1963 s. H. SALLIE 7 3,080,683

SELF-SEALING SHIVNGLE Filed Oct. 22, 1957 United rates Patent @fiice3,080,683- Paten'ted Mar. 12, 1963 3,080,683 SELF-SEALING SHINGLEStanley H. Sallie, Mansfield, Mass, assignor to Bird &

Son, inez, East Walpole, Mass, a corporation of Massachusetts Filed Oct.22, 1957, filer. No. 691,676 3 Ua'ims. (Cl. 50-103) This inventionrelates to shingles, and more particularly to such shingles in which anadhesive is used to seal down the shingle tabs raponsive to heatgenerated by the sun after the nailing down of the body portions of theshingles.

In order to achieve the desired sealing effect in situ, as on a roof,adhesive applied to shingles to produce automatic sealing-down of thetabs thereof must be very tacky at temperatures sufficiently low toinsure rapid activation by the suns heat after the shingles are naileddown in position (nails being driven of course through upper portions ofthe shingles, not through the tabs, which must depend on activation ofadhesive to be secured or sealed down). However, it is at the same timeessential that the self-sealing adhesive not function to adhere separateshingles together while the same are stacked one on another and heldtogether in bundles, as they are for shipping.

Avoiding this effect of sticking in the bundle has long been a majorproblem of the self-sealing shingle art. Many efforts have been made inthe past to solve it, none of them heretofore being altogethersatisfactory. Some patents have taught use of a layer of rupturabletissue, or a sheet of a water-soluble plastic atop the adhesive toprevent its sticking to an adjacent shingle in the package. Others havetaught use of water-soluble powders over the adhesive. Still others haverelied on mating bands of cooperative adhesive, which stick to eachother but not to other surfaces. Others actually intentionally adheredadjacent panels together in the package, relying on the applicator tofracture the adhesive bond to expose an adhesive surface on each panel.

All the above expedients have drawbacks; either rain is a necessaryprerequisite to ultimate sealing-down, or special packaging techniquesare required, or the applicator must do extra work with oftenaccompanying loose fragments of adhesives. No one of these expedientsenables packing seal-down tab shingles in the same manner that earliernon-sealing shingles were packed, permitting packing and removal withoutextra work and trouble, while at the same time preventing adjacentshingles sticking together in the package.

It is a first object of this invention to provide such a self-sealingshingle, which may be packed in the normal manner, with for example twoor three groups of shingles in a package, each group being transverselyoppositely directed from an adjacent group thereabove or therebelow. Itis a further object to permit the applicator to remove the shinglesWithout special work or attention. It is a still further object toprevent sticking in the package.

Generally speaking, my invention lies in providing a relationshipbetween the elements permitting realization of the above objects. Iplace a longitudinal row of adhesive, preferably deposited in spots,above the butt portion and on the top surface of each shingle, theadhesive preferably having a surface higher than the surface of the buttportion. On the reverse (or bottom) face of each shingle I place a layerof antistick material of width sufficient to cover the faces of theadhesive, of an underlying or adjacent shingle in a. package, whether ornot said underlying shingles are reversely transversely oriented.

Other objects, advantages and features will appear from the followingdescription, taken together with the attached drawings, in which:

FIG. 1 is an isometric view of a portion of a bundle of shinglesaccording to the invention;

FIG. 2 is a plan view of a preferred embodiment of the invention;

FIG. 3 is a sectional view through FIG. 2 at 3-3 thereof;

FIG. 4 is a plan view of a portion of a roof laid with the saidshingles; and

FIG. 5 is a sectional view through FIG. 4 at 55 thereof.

Referring now to the drawings, there is shown a thick butt shingleindicated generally at 10 and including a body portion 12 and three buttportions 14. The butt portions 14 are thicker than the body portion 12,in the manner familiar to the art, being characterized by an extra layerof asphalt and granules over said butt portions.

Extending longitudinally along the upper face of the body portion 12 ofeach shingle, and adjacent to the butt portions thereof, is a row ofspots 20 of seal-down adhesive material. Each spot may suitably be ofonehalf to one inch in diameter, and the spots are spaced so that theywill not in use merge together to prevent free escape of Water vaporfrom beneath shingles.

A satisfactory adhesive material may be blended according to thefollowing formula (by weight):

140 cracking coil tar (Enjay) 89 High melting point wax (Sunoco #5512)11 Each spot 20 is of thickness such that its face 22 lies in a higherplane than the face 24 of the butt portion of the shingle, in order toinsure good contact for good cementing, in this preferred embodiment.

Extending centrally along the lower face of the shingle 10 is a band 30comprising a layer of antistick material, which may suitably be preparedby diluting with four parts water each part of Differentiated LatexLube, Type GR, 67% solids content, as sold by Dubois Co., to form asolution which may be coated onto the shingle to form the aforementionedantistick band 30. Another suitable liquid for laying down an antistickcoating band has the following composition:

Percent Dow 22 silicone 2.5 Acetic acid, glacial 0.5 Dow XEYZI catalyst0.5

Water 96.5

It is the practice, especially with thick butt shingles, to make up eachpackage with two or more groups of shingles, the shingles of each groupbeing in alignment (i.e., the butt portions of one shingle lying againstthe corresponding butt portions of the adjacent shingle in the group),but each group being transversely reversely oriented with respect to anyadjacent group. Thus in FIG. 1 is shown a group 40 and the lowestshingle 42 of an adjacent group thereabove.

The antistick strip 30 is made of width such that it covers the adhesivespots 20 of the shingle therebelow whether the latter is of the sameshingle group or not; i.e., whether or not said lower adjacent shingleis transversely reversely oriented with respect to the shingle bearingantistick band.

When the shingles 10 are nailed onto a roof for example, in the usualmanner, by means of nails 50, the lower parts of the butt Portions 14fall over the adhesive spots 20 of underlying shingles 10, and in duecourse are cemented down thereto, by action of the suns warmth on theadhesive spots 20. The antistick strips 30 are of course safely out ofcontact with the spots 20' when the shingles are applied, as shown inFIG. 4.

It will thus be seen that I have provided the art with a new seal-downshingle which can be packaged, and removed from the package by theapplicator in the normal manner, but which nevertheless is safe againststicking in the package no matter which way a shingle is orientedtransversely with respect to the shingle therebelow.

I claim: 1. In a bundle of shingles the combination comprising aplurality of stacks of shingles, said stacks being formed of amultiplicity of identical shingles in overlying face to back relation,each of said shingles comprising a longitudinally extending body portionhaving generally parallel longitudinal edges with, in a stack direction,an upper face surface and a lower back surface, a multiplicity of buttportions integral with said body portion and extending transversely fromsaid body portion, longitudinally extending adhesive having transverseextremities adherent to said body portion on said face surfaces, bothsaid transverse extremities being on the same side of the longitudinalcenterline of each of said shingles, and a centrally longitudinallyextending layer of antistick material having transverse extremitiesadherent to said body portion on said back surfaces, the transverseextremities of said adhesive being respectively a first transversedistance from the nearer thereto longitudinal edge of the shingle and asecond transverse distance from the other longitudinal edge of saidshingle, the transverse extremities of said layer of antistick materialbeing respectively a third transverse distance from the nearer theretolongitudinal edge of the shingle and a fourth transverse distance fromthe other longitudinal edge of said shingle, said first transversedistance being diiferent from said second transverse distance, and eachof said third and fourth transverse distances being no greater than thesmaller of said first and second transverse distances, each of saidshingles having its adhesive on the same surface, all of said shinglesof a stack having butt portions extending in the same transversedirection, the butt portions of all of said shingles of a stackextending in one transverse direction and the butt portions of all ofsaid shingles of another stack extending in the opposite transversedirection, and said layer of antistick material of a said shinglecontacting said adhesive of an adjoining said shingle therebelow in saidstack, whereby shingles of a stack may be expeditiously applied on aroof, and stress on said adhesive in a bundle is reduced. 2. Thecombination of claim 1 in which said butt portions are thicker than saidbody portion.

3. The combination of claim 2 in which said adhesive is of thicknessgreater than the difference in thickness between said butt portions andsaid body portion.

References Cited in the file of this patent UNITED STATES PATENTS1,063,710 McKay June 3, 1913 2,170,147 Lane Aug. 22, 1939 2,210,209Kirschbraun Aug. 6, 1940 2,300,488 Cuno Nov. 3, 1942 2,667,131 Clarvoeet al Jan. 26, 1954 2,822,085 Bettoli ct a1. Feb. 4,1958 2,863,405Leibrook et a1. Dec. 9, 1958 2,935,416 Dunbar May 3, 1960

1. IN A BUNDLE OF SHINGLES THE COMBINATION COMPRISING A PLURALITY OFSTACKS OF SHINGLES, SAID STACKS BEING FORMED OF A MULTIPLICITY OFIDENTICAL SHINGLES IN OVERLYING FACE TO BACK RELATION, EACH OF SAIDSHINGLES COMPRISING A LONGITUDINALLY EXTENDING BODY PORTION HAVINGGENERALLY PARALLEL LONGITUDINAL EDGES WITH, IN A STACK DIRECTION, ANUPPER FACE SURFACE AND A LOWER BACK SURFACE, A MULTIPLICITY OF BUTTPORTIONS INTEGRAL WITH SAID BODY PORTION AND EXTENDING TRANSVERSELY FROMSAID BODY PORTION, LONGITUDINALLY EXTENDING ADHESIVE HAVING TRANSVERSEEXTREMITIES ADHERENT TO SAID BODY PORTION ON SAID FACE SURFACES, BOTHSAID TRANSVERSE EXTREMITIES BEING ON THE SAME SIDE OF THE LONGITUDINALCENTERLINE OF EACH OF SAID SHINGLES, AND A CENTRALLY LONGITUDINALLYEXTENDING LAYER OF ANTISTICK MATERIAL HAVING TRANSVERSE EXTREMITIESADHERENT TO SAID BODY PORTION ON SAID BACK SURFACES, THE TRANSVERSEEXTREMITIES OF SAID ADHESIVE BEING RESPECTIVELY A FIRST TRANSVERSEDISTANCE FROM THE NEARER THERETO LONGITUDINAL EDGE OF THE SHINGLE AND ASECOND TRANSVERSE DISTANCE FROM THE OTHER LONGITUDINAL EDGE OF SAIDSHINGLE, THE TRANSVERSE EXTREMITIES OF SAID LAYER OF ANTISTICK MATERIALBEING RESPECTIVELY A THIRD TRANSVERSE DISTANCE FROM THE NEARER THERETOLONGITUDINAL EDGE OF THE SHINGLE AND A FOURTH TRANSVERSE DISTANCE FROMTHE OTHER LONGITUDINAL EDGE OF SAID SHINGLE, SAID FIRST TRANSVERSEDISTANCE BEING DIFFERENT FROM SAID SECOND TRANSVERSE DISTANCE, AND EACHOF SAID THIRD AND FOURTH TRANSVERSE DISTANCES BEING NO GREATER THAN THESMALLER OF SAID FIRST AND SECOND TRANSVERSE DISTANCES, EACH OF SAIDSHINGLES HAVING ITS ADHESIVE ON THE SAME SURFACE, ALL OF SAID SHINGLESOF A STACK HAVING BUTT PORTIONS EXTENDING IN THE SAME TRANSVERSEDIRECTION, THE BUTT PORTIONS OF ALL OF SAID SHINGLES OF A STACKEXTENDING IN ONE TRANSVERSE DIRECTION AND THE BUTT PORTIONS OF ALL OFSAID SHINGLES OF ANOTHER STACK EXTENDING IN THE OPPOSITE TRANSVERSEDIRECTION, AND SAID LAYER OF ANTISTICK MATERIAL OF A SAID SHINGLECONTACTING SAID ADHESIVE OF AN ADJOINING SAID SHINGLE THEREBELOW IN SAIDSTACK, WHEREBY SHINGLES OF A STACK MAY BE EXPEDITIOUSLY APPLIED ON AROOF, AND STRESS ON SAID ADHESIVE IN A BUNDLE IS REDUCED.